Sleipnir
semi-submersible heavy-lift crane vessel · Heerema Marine Contractors
- Type
- semi-submersible heavy-lift crane vessel
- Operator
- Heerema Marine Contractors
- Region
- various (charter operator)
- Country
- Netherlands
- Commissioned
- 2019
- Status
- active
About this platform type
Heerema's Sleipnir is a semi-submersible crane vessel with the world's heaviest twin-crane lift capacity. Used for topsides installation, decommissioning, and offshore-wind foundation lifts.
For seafarers
Offshore-fleet roles command significantly higher pay than equivalent deep-sea cargo ranks (see /career-maps/offshore-vs-deep-sea-pay-tradeoff) but require sector-specific certification — DP-2/3 for marine officers on dynamically-positioned units, process-safety and operator-specific training for production-platform crews, and the offshore-specific rotation patterns (28/28 or 35/35 day). Entry requires either a maritime-academy background plus offshore conversion or transition from a related onboard-engineering background.
Sources: operator websites, classification-society publications, and offshore-industry news for the public data above. The platforms' status changes — confirm currency before relying on it for crew-scheduling decisions. Cross-references: /career-maps/highest-paying-niches-2026, /shipyards.